Hot water boiler



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' July 2, 1929. w. B. REED 1.719.402

OOOOOOOOOOOO ER Filed Sept. 1923 3 Sheets-Sheet 3 Patented July 2, 1929.

UNITED STATES PATENT OFFICE.

WILLIAM B. REED, 0F WESTFIELD, MASSACHUSETTS, ASSIGNOR TO H. B. SMITH COM- PANY, OF WESTFIELD, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

HOT-WATER BOILER.

Application filed September This invention relates to hot water supply boilers adapted to be connected to the service pipes of houses or apartments for heating water for domestic purposes and consists 111 the novel features and improvements hereinafter more fully described and illustrated and particularly pointed out in the claims.

In the accompanying drawings a preferred embodiment of the invention is illustrated by way of example, and in such draw mgs:

Fig. 1 is a front elevation of a boiler embodying the present invention;

Fig. 2 is a vertical section through the dome or water heating element of the boiler;

Fig. 3 is a top plan view of the dome;

Fig. 4 is a bottom view of the dome; and

Fig. 5 is a plan view of the lid and smokepipe assembly.

Referring to the drawings the numeral 1 indicates the base or ash pit section of the heater. This ash pit section preferably tapers upwardly and supports the downwardly tapered fire pot 2. The fire pot may be lined with fire brick or other suitable heat resistant material in the usual manner.

A dome 3 is mounted upon the top of the fire pot, constituting a cover for the latter and in turn supports the smoke bonnet 4. The dome is of substantially hemispherical form having a radial flange 5 adjacent to its equatorial edge. This flange rests upon and overlaps the upper edge of the fire pot to provide a proper bearing and support for the dome. Preferably, a second flange 5 is arranged to project downwardly into the fire pot to center the dome relatively to the latter.

The dome is of annular form having the polar opening 6 constituting a flue and passage for feeding fuel to the fire pot. The dome comprises outer and inner walls 7 and 8 spaced apart to provide the water chamber C. The outer and inner walls are preferably of substantially spherical curvature and concentric with each other, thus providing a maximum of strength with a minimum of material.

The inner surface of the inner wall 8 of the dome, that is to say that surface which is presented toward the fire, is provided with a series of projecting ribs 9. These ribs extend substantially from the edge of the polar opening 6 to the equatorial ed e of the dome and for convenience in manufacture preferably define substantially meridian planes.

5, 1923. Serial No. 660,971.

A second set of ribs 10 shorter than the first is arranged adjacent to the equatorial edge of the dome, the ribs of the second series being disposed between the ribs of the first series.

A pair of bosses 11 project from the outer wall 7 of the dome, preferably at points adjacent to the flange 5 and diametrically opposite each other. These bosses are provided with internally threaded bores 12 and 13 respectively, for the reception of pipe con nections. Other bosses, 14, and 15, also project from the outer wall 7 of the dome, the latter bosses being arranged adjacent to the openings 6 and having internally threaded bores 16 and 17, respectively. The latter bores are arranged to extend substantially at right angles to the bores 12 and 13, which lie in a horizontal plane while the bores 16 and 17 extend vertically.

The base or ash pit section is provided with the usual ash door 18 and the smoke bonnet 4 is furnished with the hinged lid 19 through which fuel may be fed, and with the smoke pipe 20.

lVhen in use, the space C in the dome is supplied with water by means of a pipe connected to the dome at one of the openings 12 or 13, while the delivery pipe is connected to one of the openings 16 or 17. Preferably the arrangement is such as shown in Fig. 1 wherein the supply pipe enters at one side of the dome and the outlet pipe is attached at the top of the dome at the opposite side, the remaining pair of openings being closed by means of suitable plugs. The provision of four openings permit-s the heater to be set up in any desired location without necessitating complicated pipe connections.

The fuel is fed through the lid 19 of the smoke bonnet and drops directly into the tire pot. In accordance with usual practice in the running of such heaters a suflicient quantity of fuel is fed at one time to last for a considerable period, as for example twelve hours of operation, and to prevent fuel from being packed too closely into the interior of the drum so as to cut off the draft from the fire pot to the smoke bonnet, the ribs 9, 10 are provided. These ribs project into the drum and provide channels between them leading upwardly from the fire pot to the flue 6. The ribs also act as heat absorbers to transmit heat from the fire to the water within the space G.

The device thus constructed is very efficient in operation due to the fact that the water surrounds the hottest portion of the tire and by the use of the spherical construction great strength is assured without unduly increasing the amount of the material employed. This is highly important in View of modern building and insurance regulations which require such heaters to be tested to withstand a pressure two and one-half times the normal service pressure. Many of the ordinary types of heater fail to meet such tests but the spherical construction hereinabove described readily withstands the highest required test pressure to which it may be subjected and at the same time is ellicient. from the heating standpoint, economical of material, and easy to manufacture.

I claim:

1. A hot water boiler comprising a substantially hemispherical water heating dome having spaced inner and outer walls of sub stantially spherical curvature, a fuel charging and fine opening through the central or polar portion of the dome, and a plurality of spaced ribs projecting from the surface of the inner wall, said ribs defining substantially meridian planes.

2. A hot water supply boiler having a fire pot and comprising a dome mounted upon the tire pot, said dome having an annular rib and an adjoining annular surface for engagement with the top of the tire pot and being provided with inner and outer spaced concentric walls of substantially hemispherical curvature, a fuel charging opening through the central or polar portion of the dome, and a plurality of spaced ribs projecting inwardly from the surface of the inner wall of the dome, said ribs defining substantially meridian planes.

Signed by me at \Vestfield, Mass. this 27th day of August, .1923.

WILLIAM B. REED. 

